Vertically-adjustable rail-engaging wheels



FIG. 1 is a front perspective view of the vertically-adjustable rail-engaging wheels, showing my new design in use condition;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a rear elevational view thereof;

FIG. 8 is a front elevational view thereof; and,

FIG. 9 is a left side elevational view of the vertically-adjustable rail-engaging wheels illustrated in FIGS. 1–8 in non-use condition.

The broken lines illustrating environmental structure are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for “vertically-adjustable rail-engaging wheels”, as shown and described. 